<template>
  <div>
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"> </el-alert>
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center="">
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs tab-position="left" v-model="activeIndex" :before-leave="tabLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader v-model="addForm.goods_cat" expand-trigger="hover" :options="cateList" :props="cateProps" @change="cateChange" clearable> </el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb, index) in item.attr_vals" :key="index" border> </el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload class="upload-demo" :action="uploadUrl" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture" :headers="headers" :on-success="handleSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor ref="myQuillEditor" v-model="addForm.goods_introduce" />
              <el-button type="primary" @click="addGoods" class="addBtn">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <el-dialog title="预览图片" :visible.sync="picDialogVisible" width="50%">
      <img :src="prePicUrl" alt="" class="prePic" />
    </el-dialog>
  </div>
</template>
<script>
import _ from 'lodash'

export default {
  data () {
    return {
      activeIndex: '0',
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        goods_introduce: '',
        attrs: []
      },
      cateList: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      // 动态参数列表
      manyTableData: [],
      onlyTableData: [],
      checkList: [],
      uploadUrl: 'http://127.0.0.1:8888/api/private/v1/upload',
      headers: {
        Authorization: window.sessionStorage.getItem('token')
      },
      addFormRules: {
        goods_name: [{ required: true, message: '请输入商品名称。', trigger: 'blur' }],
        goods_price: [{ required: true, message: '请输入商品价格。', trigger: 'blur' }],
        goods_weight: [{ required: true, message: '请输入商品重量。', trigger: 'blur' }],
        goods_number: [{ required: true, message: '请输入商品数量。', trigger: 'blur' }],
        goods_cat: [{ required: true, message: '请选择商品分类。', trigger: 'blur' }]
      },
      prePicUrl: '',
      picDialogVisible: false
    }
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        this.$message.error('获取商品分类列表失败。')
      }
      this.cateList = res.data
    },
    cateChange () {
      if (this.addForm.goods_cat.length !== 3) {
        // 只能选择三级菜单
        this.addForm.goods_cat = [] // 清空选中内容
      }
    },
    tabLeave (activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    async tabClicked () {
      // 动态参数面板
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'many' } })
        if (res.meta.status !== 200) {
          this.$message.error('获取动态数据列表失败。')
        }
        res.data.forEach(element => {
          element.attr_vals = element.attr_vals.length === 0 ? [] : element.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'only' } })
        if (res.meta.status !== 200) {
          this.$message.error('获取静态数据列表失败。')
        }
        this.onlyTableData = res.data
      }
    },
    handlePreview (pic) {
      this.prePicUrl = pic.response.data.url
      this.picDialogVisible = true
    },
    handleRemove (pic) {
      const picPath = pic.response.data.temp_path
      const i = this.addForm.pics.findIndex(x => {
        x.pic = picPath
      })
      this.addForm.pics.splice(i, 1)
    },
    handleSuccess (response) {
      const picInfo = { pic: response.data.temp_path }
      this.addForm.pics.push(picInfo)
    },
    addGoods () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          this.$message.error('请填写必要的商品信息。')
        }
        // 执行添加业务
        // 处理数据
        const subForm = _.cloneDeep(this.addForm)
        subForm.goods_cat = subForm.goods_cat.join(',')
        // 处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        subForm.attrs = this.addForm.attrs
        console.log(subForm)
        // 提交到服务器
        const { data: res } = await this.$http.post('goods', subForm)
        if (res.meta.status !== 201) {
          this.$message.error('添加商品失败。')
        }
        this.$message.success('添加商品成功。')
        this.$router.push('/goods')
      })
    }
  }
}
</script>
<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.prePic {
  width: 100%;
}
.addBtn {
  margin-top: 15px;
}
</style>
